A chromosome anomaly, abnormality or aberration reflects an atypical number of chromosomes or a structural abnormality in one or more chromosomes. A Karyotype refers to a full set of chromosomes from an individual which can be compared to a "normal" Karyotype for the species via genetic testing. A chromosome anomaly may be detected or confirmed in this manner. Chromosome anomalies usually occur when there is an error in cell division following meiosis or mitosis. There are many types of chromosome anomalies. They can be organized into two basic groups, numerical and structural anomalies.

Tumor recurrence following a period of remission is the main cause of death in cancer. The ability of cancer cells to remain dormant during and following therapy, only to be reactivated at a later time, frequently ...

Attendance at schools exposed to high levels of traffic-related air pollution is linked to slower cognitive development among 7-10-year-old children in Barcelona, according to a study published by Jordi Sunyer ...

Studies indicate that the majority of people with mood and anxiety disorders who receive the most commonly prescribed class of antidepressant medications, Selective Serotonin Reuptake Inhibitors or SSRI's, are not helped ...

Young women with ADHD who have been exposed to abuse, neglect or other traumas in childhood and adolescence are at greater risk for self-injury, eating disorders and suicide than those with ADHD who were ...

Collaborating with scientists from New York, Toronto, and Tokyo, Harvard Stem Cell Institute (HSCI) researchers have devised two methods for using stem cells to generate the type of neurons that help regulate ...

Doctors write millions of prescriptions a year for drugs to calm the behavior of people with Alzheimer's disease and other types of dementia. But non-drug approaches actually work better, and carry far fewer ...

Two hearts, said Keats, can beat as one; but a study led by Weizmann Institute scientists in collaboration with researchers from the University of Pennsylvania shows that sometimes a single heart muscle cell ...